Kodak M340 has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Blackmagic Cinema 4K has a
9.0MP Four Thirds (19 x 10 mm ) sized CMOS sensor .
Below you can see the M340 and Cinema Camera 4K sensor size comparison.
Sensor Size and Resolution Comparison image of Kodak M340 and Blackmagic Cinema 4K Cameras
As seen above, Blackmagic Cinema 4K has a 6.8x Larger sensor area than Kodak M340. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Kodak M340
or the
Blackmagic Cinema 4K ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/2.3-inch versus Four Thirds),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
